Multiple Website in Web.config
Here is some information on ASP.NET Web Application:
http://aspdotnetfaq.com/Faq/how-to-disable-web-config-inheritance-for-child-applications-in-subfolders-in-asp-net.aspx
Here is how to use this in practice:
<location path=”.” inheritInChildApplications=”false”>
<system.web>
…
</system.web>
</location>